Finishing machine



NlayA 2265 19.25. 1,539,392

A. HoLMQUlsT ET Al. f

FINI SHING MACHINE original Fild ma,n 14. 1924 Patented May 26, 1925.

UNITED STATES PATENT OFFICE.

AUGUST I-IOLMQUIST AND WILLIAM A. BJORKLUND, OF HOOPESTON, ILLINOIS,AS-` SIGNORS T' SPRAGU`E-SELLS CORPORATION, OF HooPEs-TON, ILLINOIS, ACORPORA- TION OF DELAWARE.

.FINISHING MACHINE.

Dlginai application filed February 14, 1924, Serial No. 692,716. Dividedand this Serial No. 741,336.

To all whom 'it 'may concern.'

Be it known that we, AUGUST I-IoLMQUrs'r and trium/xii A. BJORKLUND,citizens of the United States, residing at Hoopeston, in the county ofVermilion and State of Illinois, have invented new and useful Improvements in Finishing Machines, of which the tollowing is a full, clear,concise, and exact description, reference being had to thev accompanyingdrawing, toi-ming a part ot this specification.

Our invention relates to screens and more particularly to devices ofthis type employed to separate the pulpy liquid from the heaviermaterial containing crushed seeds,

pieces oi? skin, etc., of the pulp run through pulping and finishingmachines.

In linishing machines such as we have disclosed in our eri-pendingapplication, 2U Serial No. 692,716, iled by ns on February 111, 1924i,patented November 11, 1924i, .#1,515,113 a series of symmetricallyarranged brushes rotate with respect to the screen at a pre-determineddistance so that the heavier material will work away from the screen andnot be forced through the pertorations. Like the remaining parts of themachine, we have found it desirable `to construct the screen in a mannerpermitting renewal, not only of the entire structure, but also ofsections which are apt to wear or be damaged. In our copending applica.ltion, we have disclosed, in connection with the linishing machine, animproved screen capable of being renewed in part or in whole. Thepresent application is a division of our co-pending application and isdirected ,particularly to the subject matter of said screen.

According tothe construction disclosed herein, it a portion ot thescreen is punctured or worn, only such portion need be renewed. This isan important feature in that it accomplishes a remarkable saving in themaintenance cost of the machine. More over, very little time is requiredin making substitution of the new part, as provision is made forassembling the sections and holding them in a unitary rigid relation.

In order to apprise those skilled in the art how to construct andpractice our invention, we shall now describe an embodiment thereof inconnection with the accomapplication filed October panying drawing whichforms a part hereof.

In the drawings:

Figure 1 is a top plan view of a screen embodying our invention, beingpartly broken away to illustrate the manner ot` joining the sectionstogether;

Fig. 2 is a side elevation ot' the same;

Fig. 3 is a horizontal section through the screen, this view being on asmaller scale than Figures 1 and 2;

Fig. lis a detailed sectional view through the screen at a point wherethe sections thereof are joined together; j

Fig. 5 is a detailed sectional view ot the screen taken through theupper portion thereof; and

Fig. G is a fractional view ot the bottom portion ot this screen.

By referring to the drawings, it will be noted that the screen comprisesfour sections 5, 6, 7 and 8. As illustrated in Figure 4, the adjacentedges ci', say, sections 5 and G are overlapped into an interlockingfold, with a channel member 9 ior embracing the .iolded portions andsecuring the same together. The channel members 9 are preferably made ofa metal which allow said channel members: to be'pressed about the foldand to be held in this position without the provision of other securingmeans. IVe could, however, employ bolts, or the like, for locking thechanpel in place, but with the present arrangement, the use of bolts isunnecessary. l v

By referring to Figure 5 it will be noted that the upper circumferentialedge of the screen is held clamped between an upper ring 10 and a lowerring 11, these rings being4 suitably secured together, say by bolts 1Q..A similar arrangement is provided at the lower edge of the screen. `Asshown in Figure 6 a casting 14 comprises the bottomn of the screen, andabout this casting 14 an annular retaining ring 15 is bolted by means ofbolts 16. This retaining ring 15 clamps the lower edge of the variousscreen sections against an inclined face 17 formed on cast ing 111.Reinforcing rods 18 arey employed between the upper and lower edges ofthe screen to hold the latter rigidly extended. These rods at theirupper end thread into suitable brackets 19, bolted at 20 to the lowerclamping ring 11. At the lower end, the reinforcingrods 18 pass throughapertured l-ugs21 on the annular retaining ring 15. Nuts 22, or othersuitable means, may be used for holding these lower ends in the lugs 21.

From the foregoing description, it will be observed that we haveprovided an improved form of screen which, while illustrated asconical-ly formed, may have any other desired shape or configuration,such as may be required'for the particular machine into which it is tobe fitted. The finishing machine disclosed in our co-pending applicationhas been provided with a downwardly swinging pivotally mounted bowl intowhich the screen is inserted. In this prior machine, an annular recessis furnished which is closed on three sides so as to receive the annularproject-ingedge 25 of thc upper rings 10 and 11. le have found thisarrangement to be a unique way of suspending or providing a mounting forthe screen. le Awish it to be understood, however, that the screen maybe mounted in any desired way, and that we dov not desire to be limitedin this respect by our prior disclosure. le stress this point becausethose skilled in the art may readily realize the advantages ofl asectional screen such as we disclose herein, and the possibilities of'adopting this construction in a horizontal cylindrical screen.

lt will be further observed that the clamping means provided by us atthe upper and lower ends of the screen are simple and afford easy andrapid removal of any of the sections 5, 6', 7 or 8 when worn, or otherwise damaged, and anew part must be substituted therefor.

iVithout limiting` ourselves to the specific structure herein shown,except as is intended to be defined and secured to us bythe followingclaims;

lVe claim:

1. A perforated screen for a finishing inachine comprising a pluralityof sect-ions joined along their adjacent edges by an interlocking fold,and provided with means for securing and embracinosaid fold.V

` 2. A perforated screen fior a finishing machine comprising a pluralityof. sections joined along their adjacent edges by an interlocking, fold,and means for reinforcing said interlocking fold.

3. A perforated screen for a finishing maf chine comprising a pluralityof sections having their adjacent edges interconnected, and includingmeans to which the upper and lower peripheral edges of said sections maybe removably secured.

4L. A perforated screen for a finishing machine comprising a pluralityof interconnected sections, a plurality of longitudinal reinforcing rodsfor holding said sections rigidly extended, and means for removablygripping the upper and lower peripheral edges of said sections.

5. A perforated screen for a finishing machine comprising a plurality ofinterconnected sections having longitudinal reinforcing mea-ns forholding said sections rigidly extended, and means for receiving theupper and lower periphe fal edges of said sections permitting removal ofone or more of said sections.

6. A perforated screen for a finishing machine comprising a plurality ofinterconnected sections with reinforcing means to hold said sectionsrigidly extended, and means for alsol reinforcing the interconnectingedges of said: sections.

7. A perforated screen for a finishing machine` comprising a perforatedIbody portion and va pair ofclamping members at each end for receivingthe peripheral edges of said body portion.

8. A perforated screen for a finishing machine comprising a. perforatedbody portion, a pair of clamping members at eachf end for receiving theperipheral edges of said body portion, andv reen-forcing membersextendingbetween said pai-rsof clamping members for holding said bodyportions rigidly extended.

9. A perforatedA screen for a finishing machine `comprising a pluralityof interconnected sections, clam-ping members at each end for receivingthe peripheral edges of said: sections, and reenforcing membersextending between said clamping members for holding said` sectionsrigidly extended.

10.. A perforated screen for a finishing machine comprising a pluralityof sections interconnected by the adjacent edges thereof being in foldedrelation withv each other, means for securingsaid folded edges, clampingmembers at each end of said screen for receiving the peripheral edgesthereof, and reenforcing, members for holding said clamping membersrigidly spaced.

In witness whereof, we have hereunto subscribed our names..

l AUGUST HOLMQUIST..

VILLIAM A. BJORKLUND.-

